Honeybun small volume viscometer for fast, low-volume viscosity and rheology measurements.

Honeybun

The fastest low-volume viscometer for biologics out there

Unlock rapid viscosity & rheology for your biologics

Honeybun measures viscosity and rheology for up to 10 samples in a minute using just microliters of material. Its disposable consumables eliminate washing, while full shear-rate sweeps reveal exactly how your biologic formulations behave under different flow conditions. Ditch old school, one-at-a-time techniques that use too much sample and level up to the quickest, low-volume viscosity measurements out there. Get brochure.

• Rapid, parallel testing: Measure up to 10 samples in a minute, unlocking full viscosity and rheology profiles without slowing down development.

• Low sample volume: Requires as little as 35 µL per sample (even less in low-volume mode), making early-stage viscosity testing possible even when material is scarce.

• Broad viscosity range: Covers 0.5–150 cP, so you can characterize everything from early formulations to high-concentration biologics.

• Real-world temperatures: Run samples from 4–45°C, enabling measurements straight from the fridge, at ambient, or under physiological conditions.

Sample loading tray for Honeybun automatic viscometer showing low-volume microfluidic sample flow paths.

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Video

Watch Honeybun in action

Honeybun viscometer and rheometer software interface for configuring viscosity experiments and analyzing results.

Short and sweet

Fill in all the details about your samples if that’s your jam or take the fast track – Honeybun’s software will auto-fill everything so you can just start your run. Three clicks gets you through experimental setup and right to collecting data.

Satisfy your craving

When you roll with Honeybun, you’ll finally be stuffed full of all the sweet viscosity data that you need. Honeybun’s speed and throughput make it easier than ever to gather viscosity any time you make a change in your protein, concentration or formulation.

Viscosity instrument bar chart showing changes in viscosity across formulation or protein concentration conditions.
Rheology plot displaying shear rate versus viscosity measured using a microfluidic viscometer and rheometer.

Know your flow

Since Honeybun is a rheometer, every experiment includes a sweep of shear rates in each channel so you can compare how each and every sample is flowing – Newtonian or not.

Tasty at any temp

Control temp from 4 °C up to 45 °C so you’ll always know how your sample behaves – straight out of the fridge, at room temp, or in the heat of manufacturing.

Viscosity versus temperature curve demonstrating thermal behavior of samples tested on a small volume viscometer.

Tech

Learn more

Webinars

Crush it with low-volume viscosity characterization on Honeybun

Andre Mueller, PhD, Director, Product Management, Unchained Labs

Get your viscosity flow on with Honeybun

Kevin Lance, PhD, Director, Analytics Marketing, Unchained Labs

See how sweet it is to test viscosity data on Honeybun

Kevin Lance, PhD, Director, Analytics Marketing, Unchained Labs

Go with the flow for rapid viscosity results with Honeybun

Kevin Lance, PhD, Director, Analytics Marketing, Unchained Labs

App Notes

Measuring viscosity with Honeybun just got cooler
Meet Honeybun: The most rapid viscometer out there
Bun solvent & surfactant compatibility
Get low with Honeybun: 15 microliter rapid viscosity measurements

Technology

Microfluidic Viscosity Measurements

Software

Download Honeybun Software

Specifications

InstrumentSpecification
PhysicalDimensions: 46 cm W x 45 cm D x 43 cm H; 28 kg
ComputerSeparate computer with Windows 11 included
ElectricalInput voltage: 110–230 V AC 50–60 Hz
Max power: 500 W
Nitrogen or compressed air requirementsPressure: 6-10 bar (87-145 PSI)
Flow rate: ≥10 L/min
Gas type: Compressed nitrogen or air following ISO 8573-1:2010 (quality
classification 7,4,4 or class 4)
Detection methodCamera: CMOS
Resolution: 1920x1080
ApprovalCE, FCC
Application
Sample typesAntibodies and other proteins, vaccines, viral vectors and injectables
Sample temperature range 4–45 °C
Temperature control accuracy ±0.5 °C
Viscosity range0.5–150 cP
Viscosity accuracy<3%
Viscosity precision <3%
Consumable
Bun materialCyclic olefin copolymer
Samples per Bun10
Recommended sample volume35 µL (default mode) or 15 µL (low volume mode)
Measurement total time≤1 min (≤10 cP)

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